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CVE-2026-54128 Microsoft CVE debrief

CVE-2026-54128 is a high-severity vulnerability in Windows DHCP Client that allows unauthorized attackers to execute code locally. The vulnerability has a CVSS score of 8.4 and is classified as HIGH. Microsoft has released a patch for this vulnerability. The vulnerability is a use-after-free issue in the Windows DHCP Client, which can be exploited by an unauthorized attacker to execute code locally. System administrators and users of Windows DHCP Client should be aware of this vulnerability and take necessary precautions to protect their systems.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 8.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-21
Advisory published
2026-07-14
Advisory updated
2026-07-21

Who should care

System administrators and users of Windows DHCP Client should be aware of this vulnerability and take necessary precautions to protect their systems. This includes applying the patch released by Microsoft, ensuring that Windows DHCP Client is up-to-date, and monitoring system logs for suspicious activity.

Technical summary

The vulnerability is a use-after-free issue in the Windows DHCP Client. An unauthorized attacker can exploit this vulnerability to execute code locally. The vulnerability has been analyzed and has a CVSS vector of CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The vulnerability affects Windows DHCP Client, and its exploitation can lead to local code execution.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Ensure that Windows DHCP Client is up-to-date
  • Monitor system logs for suspicious activity
  • Implement additional security measures to prevent local code execution
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:18:08.873Z and was last modified on 2026-07-21T20:14:55.960Z. The NVD entry is currently Analyzed. The vulnerability has been identified in Windows DHCP Client, and its details are based on the information available from the CVE record and NVD entry. Further verification is recommended to ensure the accuracy of the information.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:18:08.873Z and has not been modified since then. The NVD entry is currently Analyzed.